package com.aviator.detective.common.util;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class SHA256Util {

    public static String getSHA256(String str){
        MessageDigest messageDigest;
        String encodeStr = null;
        try {
            messageDigest = MessageDigest.getInstance("SHA-256");
            messageDigest.update(str.getBytes("UTF-8"));
            encodeStr = byte2Hex(messageDigest.digest());
        }catch (NoSuchAlgorithmException ex1){
            ex1.printStackTrace();
        }catch (UnsupportedEncodingException ex2) {
            ex2.printStackTrace();
        }
        return encodeStr;
    }

    public static String byte2Hex(byte[]  bytes){
        StringBuffer sb = new StringBuffer();
        String temp = null;
        for (int i = 0; i < bytes.length; i++) {
            temp = Integer.toHexString(bytes[i] & 0xFF);
            if (temp.length()!=1){
                sb.append("0");
            }
            sb.append(temp);
        }
        return sb.toString();
    }
}
